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Finding the Fourth Proportional to 321,679.95, 443,882.52 and 178,404.09

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Solution

The fourth proportional to 321,679.95, 443,882.52 and 178,404.09 is: 246,177.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,679.95 : 443,882.52 = 178,404.09 : x
  2. Step 2: Convert to fraction form
    321,679.95/443,882.52 = 178,404.09/x
  3. Step 3: Cross multiply
    321,679.95x = 443,882.52 × 178,404.09
  4. Step 4: Simplify right side
    321,679.95x = 79,190,457,047.51
  5. Step 5: Solve for x
    x = 79,190,457,047.51/321,679.95
  6. Step 6: Final answer
    x = 246,177.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.